The swing circle radius is the sum of which two distances?

The swing circle radius is the sum of which two distances?

• A. Hawsepipe to pelorus distance and the scope of the chain released
• B. Water depth and ship length
• C. Bow to stern distance
• D. Distance from bow to Pelorus

Answer: (A)

The swing circle radius comes from how far the vessel can swing around its anchor, which depends on two things: the fixed distance from the hawsepipe (where the chain comes out) to the pelorus (a reference point on the deck), and the length of chain that has been let out (the scope). As the ship swings, the chain length adds outward reach from the hawsepipe, so the maximum distance from the pelorus to any point on the hull is the sum of those two distances. That’s why the radius is hawsepipe-to-pelorus distance plus the chain scope. The other options don’t account for the chain length or use irrelevant measurements like depth, overall ship length, or bow-to-pelorus distance alone.

The swing circle radius comes from how far the vessel can swing around its anchor, which depends on two things: the fixed distance from the hawsepipe (where the chain comes out) to the pelorus (a reference point on the deck), and the length of chain that has been let out (the scope). As the ship swings, the chain length adds outward reach from the hawsepipe, so the maximum distance from the pelorus to any point on the hull is the sum of those two distances. That’s why the radius is hawsepipe-to-pelorus distance plus the chain scope. The other options don’t account for the chain length or use irrelevant measurements like depth, overall ship length, or bow-to-pelorus distance alone.